My Mac book pro won't start! It boots as far as the sign in screen and then everything goes black. Please help.

Which model MacBook Pro do you have (e.g., “15-inch Late 2011”) and which version of OS X are you running?
Clinton

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My mac book pro won't start...its stuck on the apple icon and a rotating circle when i start my computer

My mac book pro wont start....its stuck on the apple icon with a rotating circle below

See this Apple note on steps to take to deal with the rotating circle on startup.

My iMac won't start up properly, it powers on the bong sound happens and then the little gear spins forever

My iMac won't start up properly, it powers on the bong sound happens and then the little gear spins forever
ive tried booting from my leapord disk
smc reset
pram reset
and safe boot

Please carefully read Apple's advice letter Gray screen appears during startup for troubleshooting steps.

My old Mac book pro won't startup. When tried I get an argyle colored apple and the clock spins until it stops, then nothing. Tried the cmd, alt, p,r but that gets a different designed apple?

My old MacBook Pro won't start up. When tried I get an argyle apple and the clock spins, then nothing. I tried cmd,alt,p,r 3 x before gong and now I get a striped apple but still not startup.

Whcih model MacBook Pro do you have (e.g., "15-inch Late 2011")?
Which version of OS X are you running?
Clinton

Mac book Pro won't start after installing a update, Mac book Pro won't start after installing a update

I installed a update on my Mac book pro, now when I try to start it, it'll come up with the apple logo and a loading bar below it, gets to about 1/4th and shuts down every time.

Hi Jacobmitchell92,
If you are unable to start up past a grey Apple screen after doing a software update, you may find the following articles helpful:
Mac OS X: Gray screen appears during startup
http://support.apple.com/kb/ts2570
OS X: When your computer spontaneously restarts or displays "Your computer restarted because of a problem.
http://support.apple.com/kb/TS4636
Regards,
- Brenden

Mac book pro won't start after latest osx update

Just keeps re-booting showing progress bar. After recent java/iTunes update the Mac book pro restarted and wouldn't shut down. So I powered it down. Anybody that could tell me how to roll back to latest successful startup?
Thanks

Hi Jacobmitchell92,
If you are unable to start up past a grey Apple screen after doing a software update, you may find the following articles helpful:
Mac OS X: Gray screen appears during startup
http://support.apple.com/kb/ts2570
OS X: When your computer spontaneously restarts or displays "Your computer restarted because of a problem.
http://support.apple.com/kb/TS4636
Regards,
- Brenden

Mac Book Pro won't start from hard drive when turned on

I have a new 15 in Mac Book Pro with 10.8.1. When I turn it on it always boots to the disk utilities rather than my harddrive. I select my startup disk and reboot. It starts fine. But when I shut it off the same sequence repeats. I have verified my drive and selected the hard drive as my startup disk.
What is happeneing? What should I try?

Step by Step to fix your Mac

My mac book pro won't start only the fan starts running alone when I turn it on but no display is shown on the screnn

My mac book pro wont start only the fan starts running when i turn it on but no display is shown on the screen

Have you tried this yet?
Intel-based Macs: Resetting the System Management Controller (SMC) - Apple Support

My Mac Pro won't start. It turns on and then a blank, white screen appears. What do I do?, My Mac Book Pro won't start. It turns on and then a blank, white screen appears. What do I do?

Mac Pro won't start. It turns on and than a blank, white screen appears. What do I do?

This could be a software/state problem or a hardware problem. Here are steps to resolve the former.
Mac OS X: Gray screen appears during startup
http://support.apple.com/kb/TS2570

Mac Book Pro won't start

My mac won't start. Even when I start with option and click recovery hd a grey screen with apple logo comes and nothing else. I started in single user mode and checked that disk is ok. Still not starting up. It happened after sudden slowing down of mac

Then your drive is OK, but you no longer have a partitioned volume. Do this:
Install Mavericks, Lion/Mountain Lion Using Internet Recovery
Be sure you backup your files to an external drive or second internal drive because the following procedure will remove everything from the hard drive.
Boot to the Internet Recovery HD:
Restart the computer and after the chime press and hold down the COMMAND-OPTION- R keys until a globe appears on the screen. Wait patiently - 15-20 minutes - until the Recovery main menu appears.
Partition and Format the hard drive:
1. Select Disk Utility from the main menu and click on the Continue button.
2. After DU loads select your newly installed hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Click on the Partition tab in the DU main window.
3. Under the Volume Scheme heading set the number of partitions from the drop down menu to one. Click on the Options button, set the partition scheme to GUID then click on the OK button. Set the format type to Mac OS Extended (Journaled.) Click on the Partition button and wait until the process has completed. Quit DU and return to the main menu.
Reinstall Lion/Mountain Lion. Mavericks: Select Reinstall Lion/Mountain Lion, Mavericks and click on the Install button. Be sure to select the correct drive to use if you have more than one.
Note: You will need an active Internet connection. I suggest using Ethernet
if possible because it is three times faster than wireless.
This should restore the version of OS X originally pre-installed on the computer.

I have a mac book air 11". When I boot up connected to the huge Thunderbolt screen it detects the detects the fact and gives me great quality. now I am travelling away from the scree it boots up, nice picture, then switches to rubbish resolution.

I have a Mac Book air 11". Normally at home I connect this to a large Thuderbolt Screen. When booting up it some times gets confused and offers me a low resolution result, but some plugging and unplugging of the screen fixes this. I assume it sometimes "sees" the big screen and sets the resolition accordingly. Sometimes does not. But now... I am away from big screen and cannot get the Macbook air on its one to deliver anything other than really poor resolution. I ahve done displays and chosen all three - but no better. And I have said Choose the Best ONe... again not luck. Any ideas. I read in back posts this was a problem a few years ago.

Welcome to Apple Discussions
I believe you have a failing GPU (aka Video Card). Run AHT and see what it tells you. Do not be afraid to run it up to three times in succession if at first it does not detect an error (sometimes errors that are caused by overheating will not show up until the computer is stressed enough - repeating AHT will do that).
As an aside - the MBA was not designed to take the place of a desktop. If you are powering your MBA by leaving it permanently attached to the thunderbolt port on the monitor you are shortening your battery life.

My MacBook pro wont wake up from sleep. The screen is blank at all times, but I can hear the fan for 5 sec then everything stops. Please help! I don't kno what to do.

My MacBook pro is about 3 yrs old. It is a 2008 model right before the new design came out. Recently I closed it up which puts it to sleep and a couple minutes later when I opened it up the screen stayed blank but could hear the fan running but then the power clicked like it was shutting down and I could hear nothing more. My power supply is working and I have already tried resetting it. Can anyone help me? I don't live exactly near a Mac store to get help.

Before resorting to an LB change-out, try this, as it has fixed many of the "silver-key" Macbook Pros with wake-from-sleep issues:
1) To get the computer running, do an SMC reset. Instructions here:
http://support.apple.com/kb/HT3964
Your MBP model uses the first option under the subhead, "Resetting the System Management Controller (SMC)"
2) If you get it running, go to System Preferences > Network and select your Airport connection
3) In the result main pane, click the "Advanced..." button.
4) You should be looking at a window with multiple tabs at the top; the "Airport" tab (far left) should be active---if not, make it so.
5) There is a panel showing "Prefered Networks." Use the "minus" button below that window to eliminate any networks that you don't need to access on more than a weekly basis. I'm down to two: the home Airport Extreme Base Station and the network for a museum at which I volunteer once a week.
5) Click "OK" and close System Preferences.
Now try letting it sleep and see it if wakes up.
When this happened to my Late 2007 MBP, I used Console to read system.log and found that, on waking, the compuer was looking for the wireless network at a lodge where I'd stayed weeks earlier and miles away. Clear the morass of old networks and keeping the list short has completely cured my wake-from-sleep issues.
The steps I listed take less time to do than to read, and are within the ability even of novice Mac users.
If that doesn't work, you may need to seek professional help. If you take it to an Apple Store and they recommend a logic board replacement, ask about a "Depot Repair." Instead of replacing the logic board on-site (which will whack you to the tune of US$700-1100), they send the computer to a central Apple refurb facility that fixes whatever they find wrong for a flat fee of about US$315 (last time someone reported using the service here). Turnaround is about one working week, and people who have taken of this service have reported being very pleased with the outcome.
You don't show a geographic location. This service may not be available if you are outside North America.

Mac Book Pro won't start up.

My friend's Macbook pro (probably 2011) hasn't been used for a month. When he turned it on, it got stuck on the gray screen with the logo and spinning wheel. I have tried doing all of the solutions that relate to this problem except for re dowloading the OS, which I can't do because the disk reader is broken.
It has been on the start up screen for more than an hour and does not seem to be doing anything
also, after force-shutting it down...when I restart it, there is a loading bar that dissappears after about 5 seconds. It doesn't fill up.
there is nothing attatched to it, so there shouldn't be any problem with the peripherals.
When running the safeboot, it says that there is a runtime corruption. I refuse to take the computer to the applestore because it is past the two year warrantee....

The fact the DVD drive is broken says there are greater problems. Bring it in for service.

I am using my first apple product, mac book pro. somehow i FIGURED OUT HOW TO INCREASE THE FONT FOR SEARCHES AND WEB PAGES, BUT THE FONT IS TOO BIG AND FOR THE LIFE OF ME I CAN NOT FIND WHERE TO GET THE SCREEN BACK TO NORMAL, HELP ANYONE?

I am new to Apple, somehow I figured out how to make font of Web pages bigger, but it is too big and I can't use sites properly. for the life of me I can not how to get my font size reduced. Help anyone? thank you, sbb

Probably command-minus will do the trick.

When I start up Iget the white screen and then it goes black and does not respond.

My iMac appearso have crashed. When I start up i get white screen,but there is no strt up box. It the goes dark with blac screen. It does not respond afterwards. I have some important information on the hard drive and I don't have backup.

Hey Sarves!
I have an article for you that may help you resolve this issue:
Mac OS X: Gray screen appears during startup
http://support.apple.com/kb/ts2570
While the article is written for a gray screen appearing, the troubleshooting steps may still help you resolve this issue. Thanks for being a part of the Apple Support Communities!
Cheers,
Braden

My Mac book pro won't start! It boots as far as the sign in screen and then everything goes black. Please help.

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